Select the correct answer. Which data-gathering activity would be useful for a biomechanical analysis? A. creating a graph that compares the salaries of professional gymnasts B. comparing the numbers of female gold medalists and male gold medalists in gymnastics C. tracking the increase in the number of gymnastics programs in a city over the course of a decade D. measuring the angle at which a gymnast's body bends during an aerial flip
What is the force exerted on a moving charge of -2.0mu C at a 20^circ angle through a magnetic field of 3.0times 10^-4 T with a velocity of 5.0times 10^6m/s 3.0times 10^-3 1.0times 10^-3 1.0times 10^3
10-02-01 Which statement about electromagnetic radiation is true? It is visible to the human eye. It is always dangerous to humans. It is only hazardous to living things. It is energy in the form of waves.
8. (7 points)A tree stump is dragged 30 m by a truck with a chain at 31^circ above horizontal and tension of 17 ,000 N. Find the work done. Round to the nearest N m.
Which objects in our Milky Way Galaxy have orbits that are not similar to the orbits of stars in elliptical galaxies? halo stars disk stars satellite dwarf galaxies globular clusters bulge stars
As relating to beam spread, the larger the crystal, the __ the beam. a. broader b. longer c. tighter or narrower d. shorter
When an electric current is applied to the piezoelectric crystal, it: a. vibrates. b. produces liquid crystals. c. forms gas. d. permanently changes form.
An ideal current source produces a[n] __ value of current through a load, regardless of the value of the load. Select one: a. decreasing b. constant c. proportional d. increasing
Ohm's law is I=Vdiv R What's the voltage of the battery described? A circuit has one 10.0-ohm resistor. The current flowing through the circuit is 0.15 amps. So the battery in the circuit is a square -volt battery.
Which of the following corresponds with a high change in velocity (acceleration). during a constant period of time? There is an increase in Delta p and applied force. There is a decrease in Delta p and applied force. There is an increase in Delta p and a decrease in applied force.
What is the relationship between velocity and acceleration? Acceleration is the change in velocity over time. Velocity is the change in acceleration over time. Velocity and acceleration are equal and opposite. Velocity and acceleration have nothing to do with each other.
19. The process by which atomic nuclei spontaneously decay is called relative dating radioactivity erosion deposition 20. The time it takes for 50 percent of the nuclei in a radioactive sample to decay to its stable isotope is called the daughter product geologic time the half-life the half-time 21. The scientist who developed the theory of evolution was Harry Hess James Hutton Charles Darwin William Smith
Radloactive nuclel undergo decay because they are unstable. a TRUE b FALSE
Which of the following would cause a change in the speed of a sound wave? a the wave being made by a larger vibration b the wave moving through water C the wave changing medium from a gas to a liquid d the wave being made by a smaller vibration e none of the above
A man pulls a vacuum forward 13.6 m with a force of 33.9 N at a $55.0^{\circ }$ angle. How much work is being done to the vacuum by the man? $W=[?]J$
Select the cause of evaporation. Waves from the ocean Energy in the clouds Heat from the Sun Rain on the ground
True/False: The mass of the object affects the rate at which it falls. True False
If more force pushes two surfaces together, then the friction between the surfaces will __ stay the same increase decrease
Which of the following is the ideal way to apply pressure onto pedals? Gently at first and then with full force Stomping with force, so it reacts With your entire body weight behind it By pressing gradually
Select all of the types of electromagnetic waves that are ionizing radiation. gamma infrared microwave ultraviolet X-ray
